反应详情

To a solution of tert-butyl 3-((N-(biphenyl-4-ylmethyl)-3,5-dichloro-2-hydroxyphenylsulfonamido)methyl)benzylcarbamate (2.77 g, 4.41 mmol) in CH2Cl2 (15 mL) at rt was added TFA (6.8 mL, 88.0 mmol). The reaction mixture was stirred at rt for 4 h. It was concentrated and the residue was diluted with ethyl acetate and saturated aq NaHCO3 solution. The EtOAc layer was separated, washed with brine, dried over MgSO4 and concentrated in vacuo to give the product as a white solid (2.3 g, 96%). 1H NMR (DMSO-d6): δ 8.30 (bs, 1H), 7.61 (d, J=7.6 Hz, 2H), 7.59 (s, 1H), 7.51 (d, J=8.0 Hz, 2H), 7.45 (t, J=7.6 Hz, 2H), 7.32 (m, 2H), 7.29-7.18 (m, 5H), 7.10 (m, 1H), 4.43 (s, 4H), 3.93 (s, 2H), 3.32 (s, 2H).

1. concentrationIt was concentrated
2. additionthe residue was diluted with ethyl acetate and saturated aq NaHCO3 solution
3. customThe EtOAc layer was separated
4. washwashed with brine
5. dry with materialdried over MgSO4
6. concentrationconcentrated in vacuo